Cast and credits of Obsidian

Olivia Olson
Marceline the Vampire Queen / Additional Voices (voice)

Hynden Walch
Princess Bubblegum / Additional Voices (voice)

Michaela Dietz
Glassboy (voice)

Dee Bradley Baker
Molto Larvo / Additional Voices (voice)

Maria Bamford
Sandy / Additional Voices (voice)

Audrey Bennett
Young Marceline (voice)

Jeff Bennett
Limeston / Choose Goose / Additional Voices (voice)

Tom Kenny
Simon Petrikov / Additional Voices (voice)

Erica Luttrell
Elise / Additional Voices (voice)

Charlotte Nicdao
See-Thru Princess / Ancient Glass Princess / Additional Voices (voice)

Kevin Michael Richardson
Sir Soda / Smudge / Additional Voices (voice)

Jeremy Shada
Finn (voice)

John Di Maggio
Additional Voices (voice)

Pendleton Ward
Additional Voices (voice)

Niki Yang
Additional Voices (voice)